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  • 4T45E Pump Failure
    Wednesday, November 13, 2019 4:01 PM
    Most of us are all too familiar with the effects pumps can have on a transmission when they fail. No move, delayed engagements, clutches and/or bands incinerated and more. It is interesting to note the type of pump a transmission is using, and the advantages and dis-advantages associated with that style of pump. Take for example a gear and crescent style pump. This is otherwise known as an internal gear, positive displacement pump. It has been the primary fluid mover for years in automatic transmissions having three basic stages, it fills (sucks), transfers and delivers.
  • Wiggle the Wires
    Wednesday, November 13, 2019 1:46 PM
    Acouple of months ago we had a customer come into our location with a 2006 Kia Spectra equipped with the 2.0L engine and an A4CF2 transmission. The customer’s concern was that the vehicle would not shift at times. I started the evaluation by checking all the fluids, doing a visual inspection, and conducting a battery and charging system test with the Midtronics analyzer, and everything checked out good. I then moved on to connecting the scan tool to the vehicle and checking all modules for DTCs; the only one that came back was a P0748 (linear solenoid) electrical problem. There was no freeze frame data stored; it probably wouldn’t have helped me with this issue, but I wanted to see if it would at least show the speed or temperature at which the code set. From the customer’s description it sounded like an intermittent issue.
  • Critical Wear Areas & Vacuum Test Locations
    Wednesday, November 13, 2019 1:36 PM
    Critical Wear Areas & Vacuum Test Locations
  • Exploring Some of the Mystery in the MP3023 Transfer Case
    Wednesday, November 13, 2019 1:30 PM
    Introduced in 2011 in the Jeep Grand Cherokee WK2 series and Dodge Durango vehicles and continuing into 2019, there are a lot of these units on the roads. Magna Powertrain designed and produced the 3023 and 3010 transfer cases. The 3010 series is a single speed active transfer case (no low range) called Quadra-Trac Active on Demand, which is standard on the SRT8 models. The 3023 is a two-speed active transfer case electronically controlled by computer that requires no intervention on the driver’s part.
  • 2012 KIA Optima 2.4 Hybrid
    Wednesday, November 13, 2019 1:19 PM
    Not often do we get the opportunity to work with a tech that is having issues with a transmission in a hybrid vehicle. Not too long ago, Gerald Campbell had the chance to do just that with Carlos Costa from Transmission Technology. He had a 2012 Kia Optima 2.4L Hybrid using an A6MF2H transmission. There is no torque converter in this transmission.
  • Overcharged
    Thursday, October 10, 2019 1:57 PM
    The past 28 years of being involved with ATSG’s technical help line has been a continuous learning experience. Particularly when a problem is resolved outside the parameters of what would normally fix the problem.

    For example; several years back Lorenzo Ortiz from Phillips transmission had a 2003 Jeep Grand Cherokee 4.0L 4x4 with a 42RE come into the shop for transmission repair. After installing a rebuilt transmission, the vehicle exhibits a misfire. This was not a problem before transmission repairs. Upon inspection, the vehicle has stored a P0352 code for an ignition coil #2 primary circuit fault.

  • Spotting the Changes to Ford 6R80 ’15-Later Valve Bodies
    Thursday, October 10, 2019 1:52 PM
    Ford has made some changes to the ’15-later 6R80 valve bodies that you’ll want to note to prevent any interchange and drivability problems. Following are some of the key identifiers and details on the one valve lineup change to help keep you building successfully.
  • That’s a New One
    Thursday, October 10, 2019 12:34 PM
    There are a lot of us in this industry that have been at it for a long time, and I think most of us have said more than a few times, “Well that’s a new one.” I don’t know how many others of you out there have come across this problem before, but I know in my personal experience I have not. While this is not a terribly technical story, it is one that we found interesting, and as you will see, it had a scenario along the way that would make it a little more difficult to figure out.
  • Allison® 1000/2000/2400, ’00–’15
    Sunday, September 1, 2019 12:00 AM

    Allison® 1000/2000/2400, ’00–’15

    Critical Wear Areas & Vacuum Test Locations

  • A Transmission Problem, Or Something Else?
    Sunday, September 1, 2019 12:00 AM

    The subject of this article is a 2007 Nissan Maxima that was brought to us from a shop that we do a lot of work with. They had initially called and wanted to see if we could point them in a direction on what to look at. The shop had stated the vehicle had code P0868 (secondary pressure down), but after the code was cleared, it had not returned yet the car was still acting up. It would cut out and go into limp mode. I had asked about any other codes in other systems and they said it had a C1109 code (battery voltage out-of-range) in the ABS module, and the battery had been replaced a few weeks ago. I told them to make sure that the charging system was working properly and get back to me with what they had found. 

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Beyond the missions of providing education and reference materials, Transmission Digest serves as a prime resource used as shops find the parts, supplies and services necessary for successful and profitable operation. Nine of the 12 issues published each year are focused on the products, services and suppliers relating to a specific profit center within the retail shop.

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